i dont think it will change the control pressure as in at the WUR. it really lowers the system pressure that is at the bottom or lower chambers. this lets the spring on top push down more on the diaphragm letting more fuel in. this leads me into what i wanted to say from the begining.
raising the system pressure would lean it out reducing the fuel at hi RPM,, and across the band.

is there really an issue with 100ron fuel and the amount of time at 6500?